Improvement in punching-machines



latter, and to the punch-stock at its opposite end,

B the punch-bed or die, over which the metal to be f. ,M ,1., *tant- WAR-RE N LYON, OF NE'W YORK, N. Y.

n Letters Patent No. 83,981, lated November 10, 1868. I

IMPROVEMENT IN PUNCHING--MACHINES.

The Schedule referred to in these Letters Patent and making parl: of the lama.

To all whom it may concern Be it known that I, WARREN LYON, of the city, countv, and State of New York, have invented a new and useful Improvement in Punching-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanyingdrawing, forming part oi' this specication, and in which- Figure, l represents a front elevation of a punchingmachine constructed in accordance with my improvement, and

Figure 2, a side View, partly sectional, ofthe same.

` Figure 3 shows an edge view, on an enlarged scale, of the slotted toothed sector, with pitnian attached, used to operate the punch-stock.

Similar letters oi' reference indicate corresponding parts.

This, my invention, consists in a novel arrangement of devices with and for operating a sliding punch or punch-stock, including a lever, pinion, toothed sector, and pitinan, ecccntrically pivoted at its one end to the whereby a most advantageous application of power is obtained, and by it l am enabled, for a given stroke, to work closer to the Vcentre of the sector, aud use a shorter lever than where a cam or eccentric is used to operate the punch-stock. I

Referring to the accompanying drawing, A represents the main frame of a hand-punching device, and

punched is slid from one side along a gauge, C, which should be made adjustable in its attachment to the frame, to suit different kinds o r widths of work, that, in thus being guided by the gauge, is also held down to thc bed or restrained from lifting with the risc of the punch, by causing the metal to slide under a cap-plate4 or stop, D, which should likewise be made adjustable in its connection with thc frame, and through which, by a slot made therein, the punch, ,is permitted to play.

Said punch e, that may be of any suitable size 0r shape, and varied at pleasure, according to the size and character oi' the hole to be made, is carried by a punchstock or holder, E, arranged to have sliding motion within and through a box or steadying-guide, F, secured to the main frame.

This punch-stock E has pivoted or jointed to it, at its top, as at b, a pitman, G, which, entered and working within a slot, s, made in a toothed sector, H, is eccentrically pivoted thereto, as at c, and which, to secure a powerful action, may be atpbut a short distance or throw from the centre or shaft, (l, of the secr tor, said shaft, and also a pinion-shaft, c, being carried by suitable projections from the mainframe.

Thelast-nientioned shaft, e, carries a pinion or parrpinion, I, which gears with the sector H, and is operated by a lever, J, that in being worked from the position shown for it by black lines to that represented for it in red lines, iig. 2, nieves the sector H, pitman G, and punch-stock E, t0 the positions in which said parts are indicated by red lines, or, in other words, completes the downward stroke of the punch a.

'lo give an upward stroke to the punch, the motion ofthe lever, with its workiiig-attachments, is reversed.

ln thus operating my machine, there is great sim- .plieity and steadiness of action obtained, and, as compared with a cam or eccentric to work the punch, it is possible, for a given stroke, to work much closer to the working centre (l, and to secure a more powerful action oi' the p uuch'with or through a comparatively short hand-lever, J.

By the slotted construction of the toothed sector H, the driving-connection of the latter with the punchstock, by orthrough the pitman G, is made in direct line with said stock through its centre, which obviates lateral strain, and by which construction bearings, f, for the working-shame, of the sector', are admissible in all throws or playsI of the pitman, however close said pitman may be pivoted to the working-shaft. This 

